Two months later, police were called less than a mile away to Central Elementary School, which was under renovation. They found doors, windows and glass blocks broken and damaged inside a construction area.

Valparaiso Police Sgt. Mike Grennes told The Times of Northwest Indiana that authorities believe the students gained access to the building through boarded-up areas of construction and a screen door.

A week later, more vandalism was discovered at a school about a mile away. Ductwork, copper piping, and metal doors were damaged in a construction area.

School officials have contacted contractors about the incidents and asked them to be sure the buildings aren't accessible to outsiders after the workday ends.